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Question

Which among the given acids is a diprotic acid?


A

HNO3

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B

H2PO3

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C

HClO3

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D

H3PO3

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Solution

The correct option is B

H2PO3


Diprotic acids belong to a class of Arrhenius acids which are capable of donating two protons or hydrogen cations per molecule when dissociated in aqueous solutions.
H3PO3 2 H+1 + HPO23


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